Bending machine



Feb. 19, 1929. 1,702,856

A. TROSCH v BENDING MACHINE Filed June 14; 1927 4 Sheets-Sheet 1 mvErgoR .Troscfi/ ATTORNEY Feb. 19, 1929.

A. TROSCH BENDING MACHINE 4 Sheets-Sheet 2 Filed June 14, 1927 INVEN'LOrcd iosc/e/ m ATTORNEY Feb. 19, 1929. I 1,702,856

A. TROSCH BENDING MACHINE Filed June 14, 1927 4 Sheets-Sheet 5 INYENTORV ficpzrmscz/ kwemwhfg,

@ A/ ATTORNEY Feb. 19, 1929.

.A. TROSCH BENDING MACHINE Filed June 14, 1927 4 Sheets-Sheet 4 wl lv V9 ATTOR N EY Patented Feb. 19, 1929 uNr-rso "STAT-Es I 1,702,856 PATENTH OFFICE.

ALFRED rnoscn, O F ROCHE STER, NEW YORK, ASSIGNOR TO CONSOLIDATED mom'roon con-rename}: or AMERICA, or ROCHESTERNEW YORK, A CORPORATION 01'DELAWARE.

relative to the other, that is simple,- ellicient,

and compact, taking up a minimum amount of floor spaceand operatingsmoothly.

Another object is to provide a compact 1 driving mechanism which givesproper speed reduction between the motor and driven roll and therebypermits use of an looking at the right end thereof;

electric motor with satisfactory results.-

Another object to arrange compact andellicient speed reducing mechanismbetween the roll elevating and lowering means and the controlling motortherefor so that an electric motor may be used also for adjusting thebodily-movable roll. q i

A further object is to provide an efllc ent and simple mechanism wherebyeither end of the bodily movable roll may be adjusted separately or bothends may be adjusted s1- multaneously.

Still another obj ple and eflicicnt lubrication of the speed reducingmechanism units controlling both rotation and relative adjustment of therolls; a With these and other ends in view, the invention comprises thestructure and combination of parts which will appear more clearly fromthe following description when re; n conjunction with the accompanyingdrawings, the novel features being pointed out in the claims followingthe specification.

In the drawings:

Figure 1 is a side elevation of a bending machine showing one possibleembodiment of my invention;

Figure 2 is a plan view thereof;

Figure 3 is a section through the bending rolls o f the machineshowingtheir action in bending a plate into eylindrical form,

Figure 4 is an end view of the machine Figure 5 is a sectional viewtakenapproximately on the line 55 of Figure 2 and" illustrating onepossible embodiment of the drive for the adjusting mechanism; t

Figure 6 is a sectional view taken approximately on the line 6-6 ofFigure 2, at right angles to the plane of Figure 5, and

Figure '7 is a section approximately on the line 77-of Figure 1. 1

' ards.

set is to provide for sim-' I VIBENDILNGMACHINEK Application filed June14, 1927. Serial No. 198,702.

The invention may be applied to various typesof bending machines and ishere illus-" trated in conjunction with one conventional type having abed plate 11 with standards 12 and 13 at the'ends thereof. Lower bendingrolls 14 and 15 are journalled at their ends in these standards, and attheir left hand ends carry drive pinions 16 and-l7 respectively. Anupper bending roll 18 is placed above the rolls 14 and 15 and isadjustable relative to the lower rolls so as to obtain variouscurvatures on the plates being bent by the machine.

To this end, the'ends of the roll 18 are not journalled directly in thestandards 12 and 13 butare mounted in members which are movablevertically relative to the stand- The left hand end of the adjustableroll may be journalled ina block 19 which is attached through a pin'20to a yoke 21 slidable in vertical guideways in the standard l3 andsecured at its lower end to a rod 22 having screw threads 23 thereon.The right hand end of the adjustable roll 18 may be journalled in ablock 24 connected through the-pin 25 to the yoke 26 which is attachedat its lower end to a member 27 slidable vertically ina slot 28 'inthestand ard 12. The' lower' end of the member 27 is pivoted at 29 to a rod30, which, like'the rod 22, carries screw threads at the bottom thereof.Preferably, the block 24 is cut away above the end of the roll'18, and atapered block 31 is inserted in the opening. 7 The lower side of theblock 31 is provided with a suitable bearing surface for the end of thethe member 27 may be swung away from the end of the roll about the pin29 asa pivot. v

To the left of the bed plate 11 is an extension 32 thereof, to whichmaybe attached a pair of vertical rods 33. Across-piece34 connects theserods at the top and through this cross-piece is threaded a screw 35having a hand-wheel 36 at the top thereof and a bearing block 37 at thebottom. This block 37 is arranged, when the screw 35gb screwed downward,to bear upon an extension 38 at the left hand end of the roll 18.Therefore, when the yoke 26 has been moved away from the right hand endof the roll 18, as above described, the screw 35 may be utilized todepress the extension 88 and raise the right hand end of the roll, whichthen pivots about the pin 20. Such a construction is necessary becauseit is of-en desired to bend plates into cylindrical form, as shown inFigure 3, and when the cylinder has been completed there is no way ofremoving it from the rolls except to raise the end of the roll 18, asabove described, and slip the cylinder off the end thereof.

The mechanism heretofore described is a well known type of bendingmachine and forms no part of the present invention. This inventionrelates to a driving mechanism for rotating the rolls and the mechanismfor adjusting the top roll 18 with respect to the bottom rolls.

The drive mechanisms heretofore used on bending rolls have been costly,complicated, and cumbersome. As is well known in the art, bending rollsmust rotate at a comparatively slow speed. VJhere electric motors havebeen used for driving them, the speed of the motor has been found muchtoo high for the speed of the roll, and it has therefore been necessaryto provide a long series of speed-reducing gears in order to accomplishthe transition from the high speed of the motor to the low speed of theroll. These gears have taken up a large amount of space, have beencostly to manufacture, and to keep in repair, have been difficult tolubrioate, and have resulted in much less of power and lack ofsmoothness. The present invention overcomes these objections by the useof a simple and effective drive which reduces the high motor speed tothe required slow speed without difiiculty, which is easy andcomparatively inexpensive to manufacture and to keep in repair, whichtakes up comparatively little room, and gives a generally smootheroperation. Furthermore, it is easy to lubricate, and greatly reduces thefrictional losses.

The invention may be carried out in a number of ways, and as onepossible embodiment, there is shown an electric motor 40, mounted uponthe bed plate 32 which is rigidly connected to the bed plate 11.Directly connected to the armature shaft of the motor is a worm 41 whichdrives a worm wheel 42, the latter being fixed to a jack shaft 43.journalled on a pedestal 4. A pinion 45 near one end of the shaft 43meshes with both the pinions 16 and 17 on the lower rolls 1 1 and 15. Ahousing 426 completely surrounds the worm ll and worm wheel 4-2, and ispreferably made oil tight. This housing may be kept partially filledwith oil so that the worm and worm wheel run constantly in a bath ofoil. The worm and worm wheel may be of any suitable material, althoughit is preferred to use a vanadium steel worm and a phosphor bronze wormwheel because of the suits obtained therefrom.

It will be observed that this construction takes up but little room. Atthesam'e time, the use of the worm drive reduces the motor speed to thedesired roll speed in a single step, thus eliminating the long trains ofspeed-reducing gearing heretofore used, and doing away also with theexcessive frictional losses inherent in such trains. The drive is easilyand thoroughly lubricated, since it may be run in a bath of oil. As itconsists of but few parts, it is comparatively easyand cheap tomanufacture and to keep in order, and takes up much less space than thedrives heretofore commonly used.

The improved mechanism for adjusting the top roll 18 will now bedescribed. It is apparent from the mechanism described above that theroll 18 may be adjusted by raising or lowering the rods 22 and 30. Asheretofore described, these rods each have screw threads near theirbottom ends. A worm wheel is threaded upon each of "these rods and isretained against Vertical movement by suitable thrust bearings 51 and 52in the standards 12 and 13. Thus it is seen that rotation of the wormwheels 50 will result in screwing the rods 22 and 30 up or down,effecting adjustment of the top roll 18.

In order to produce the desired rotation of the worm wheels 50, theremay be pro-, videda motor 53 mounted upon the bed plate of the machine,between the standards 12 and 18, where it will take up but little roomand thus not increase the floor space of the machine. Directly connectedto the armature shaft of this motor is a Worm 54 driving a worm wheel.55 on a shaft 56. This worm'and worm wheel may be of any suitablematerial, such as a vanadium steel worm and a phosphor bronze wormwheel. Preferably, an oil-tight housing 57 surrounds the worm and wormwheel and enables them to be run constantly in a bath of oil.

Just outside of the housing 57, both ends of the shaft 56 are providedwith clutch jaws 58. In alinement with the shaft 56 are two jack shafts59 and 60 to which are affixed worms 61 and 62 meshing with the goodrejaws 63and 64, so that movement of the arms 65,0r 66 will slide theclutch 'aws 63 or 64 respectively alongtheir sha ts, and

ing motor 40 and the adjusting motor 53 are preferably of the reversingtype, so that they may be operated in either direction.

From the foregoing description it is apparent that the upper roll 18 maybe ad justed with great ease. Either end of the roll may be raised orlowered by itself, by clutching in one or the other of the clutches 63or 6%, or both ends may be raised or lowered simultaneously by engagingboth clutches at once. Rotation-of the motor 53 in one direction willraise the roll, while reverse rotation will obviously result in loweringit. By providing separate driving and adjusting motors, it is possibleto adjust the rolls at the same time that a plate is being fed throughbetween them, Without in any way interfering with the feeding operation.

lVhile one embodiment of the invention has been disclosed, it is to beunderstood that the inventive idea may be carried out in a number ofways. Therefore it is not desired to limit this application to theprecise details shown, but it is intended to cover all modificationsthereof falling within the spirit of the invention or the scop of theappended claims.

I claim:

1. Ina bending machine, the combination with a plurality of bendingrolls, of a driving motor therefor, said motor having a main drivingshaft, a worm in alinement with and operatively connected to saiddriving shaft, a worm wheel driven by said worm, a shaft on which saidworm wheel is mounted, the axis of' said shaft-being parallel to theaxis of one of said bending rolls, a pinion on said shaft, and a pinionon one of said bending rolls, said second pinion meshing with said firstpinion.

2. In a bending machine, the combination with a plurality ofbendingrolls, of an elec tric driving motor therefor, said motor having'anarmature shaft perpendicular to the vertical plane of the. axis, of oneof said rolls, a worm connected to and in alinement with said armatureshaft, a jack shaft perpendicular to the vertical plane of the axis ofsaid armature shaft and parallel to the bending rolls, a worm wheelonsaid jack shaft arranged tobe driven by said worm, a pinion on said jackshaft, and apinion on one of said rolls meshing with the pinion on thejack shaft.

3. In abending machine, the combination of a plurality of bending rolls,oneof said rolls being adjustable with respect to another, separatemeans for adjusting eachend of said adjustable roll, an electric drivingmotor having an armature shaft arranged transversely of the machine, aworm driven by said motor and with its axis arranged transversely of themachine, a worm wheel driven by said wormand having its axis arrangedlongitudinally of the ma chine, and means for operatively connectingsaid worm wheel to either or both of said separate adjusting means, atwill.

4. In a bendingmachine, the combination of a plurality of bending rolls,one of said rolls being adjustable with respect to another, separatemeans for adjusting each end of said adjustable roll, each of saidseparate adjusting means including a threaded rod and a worm wheelmounted upon said*rod,fa worm for driving each of saidworm wheels, ashaft upon which each of said worms is mounted, saidshafts being alinedwith but separated from each other, a driving motor, a worm driven bysaid motor, a worm Wheel driven by said worm, a shaft on j which saidworm wheel is mounted, said shaft beingbetween and alined with said Wormshafts, and clutches for connecting either or both of said worm shaftswith said worm wheel shaft.

'5. In a bending;machine,the combination of a plurality of bendingrolls, one of said rolls being adjustable with respect to another,separate means for adjusting each end of said adjustable roll, anelectric driving motor having an armature shaft arranged transversely ofthe machine, a worm driven by said motor and with its axis arrangedtransversely of the machine, a worm Wheel driven by said worm and havingits axis arranged longitudinally of the machine, an oil-tight housingenclosing said worm and worm wheel, and means for operatively connectingsaid worm whee" to either/ or both of said separate adjusting means, atwill. i w

6L In abending machine, the combination .of a plurality of bendingrolls, one of said rolls being adjustable with respect to another,separate means for adjusting each end of said adjustable roll, anelectric driving motor having an. armature shaft ar ranged transverselyof the machine, a vanadium steel worm driven by said motor and with itsaxis arranged transversely of the machine, a phosphor bronze worm wheeldriven by said worm and having its axis arranged longitudinally of themachine,

and means for operatively connecting said worm wheel to either or bothof said separate adjusting means, at will.

7. In a bending machine, the combination of a plurality of bendingrolls, one of said rolls being adjustable with respect to another, alongitudinally movable member conected to each end of said adjustableroll, each of said longitudinally movable members having screwthreads, aworm wheel threaded upon each of said members, an electric motor mountedbelow said rolls and having its armature shaft perpendicular to thevertical plane of the axis of one of said rolls, a worm connected to andinalinement with the armature shaft, a worm w reel driven by said worm,said worm wheel being mounted upon a shaft below and sub stantiallyparallel to said rolls, jacl: shafts at each end of and in alinementwith said worm wheel shaft, a worm carried by each jack shaft andoperatively engaging one of the worm wheels upon th threaded members,and means for connecting either or both of said jack shafts to said wormwheel shaft, whereby rotation of the motor will operate either or bothof the li st mentioned worm wheels so as to move e ther or both of saidlongitudinally movable members to adjust said adjustable roll.

8. In a bending machine, the combination with a plurality of bendingrolls, one of which is adjustable relative to another, of an electricdriving motor for said rolls, said motor having an armature shaftperpendicular to the vertical plane of the axis of one of said rolls, ajack shaft substantially parallel to the axis of said rolls, a wormdriven by said armature shaft, a worm wheel on said jack shaft driven bysaid worm, pinion on said jack shaft, a pinion on one of said rollsmeshing with the pinion on the jacl: shaft, a second electric motormounted below and between the ends of said rolls, said second motorhaving an armature shaft perpendicular to the vertical plane of the axisof one of said rolls, a Worm driven by the armature shaft of the secondmotor, a worm wheel shaft substantially parallel to the axis of saidrolls, a worm wheel mounted upon said worm wheel shaft and driven bysaid worm, a jack shaft at each end of and in alinement with said wormwheel shaft, said jack shafts extending from the worm wheel shaftsubstantially to transverse planes drawn through the ends of the bendingrolls, means for operathrely connecting either or both of said jaoltshafts to said worm wheel shaft, and means operated by ach jack shaftfor adjusting one end of the adjustable roll.

9. In a bending machine, the combination with a pair of bending rollsarranged in the same horizontal plane and a single bending roll locatedthereabove, pinions carried by each of said pair of bending rolls; adriving motor, a worm driven by said motor, a worm wheel driven by saidworm, a shafton which the worm wheel is mounted, and a pinion carried bysaid shaft and engaging boththe aforesaid pinions on thesaid pair ofbending rolls.

10. In a bending machine, the combination with a pair of bending rollsarranged in the same horizontal plane and a single bendingroll arrangedthereabove, pinions carried by each of said pair of bending rolls, anelectric driving motor having an armature shaft arranged transverselywith relation to said bending rolls, a worm driven thereby, a worm Wheelengaged by said worm, a shaft carrying said worm wheel, and a pinion onsaid shaft engaging and driving both the aforesaid pinions of said pairof bending rolls. i

11. In a bending machine, the combination with a pair of bending rollsarranged in the same horizontal plane and a single bending roll arrangedthereabove, pinions on each of said pair of bending rolls, a; drivingmotor, a worm driven by said motor, a worm wheel driven by said worm, anoiltight housin enclosing said worm and worm wheel, a shaft on which theworm wheel is mounted, and a pinion carried by said shaft and engagingeach of the pinions on the aforesaid pair of bending rolls. 7

12. In a bending machine, the combination with a pair of bending rollsarranged in the same horizontal plane and asingle bending roll arrangedthereabove, a pinion on each of saidpair of bending rolls, a drivingmotor, a vanadium steel worm driven by said motor, a phosphor bronzeworm wheel driven by said worm, a shaft on which. the worm wheel ismounted, and a pinion on said shaft engaging each of the pinions on saidpair of bending rolls.

13. In a. bending machine, thecombination with a plurality of bendingrolls, one of said rolls being adjustable with respect to another, aworm wheel for adjusting each end of said adjustable roll,a wormengaging and driving each of said worm wheels, shafts extendinglongitudinally of the machine in alinement with each other and carryingsaid worms which engage the worm wheels, an electric motor having anarmature shaft and worm arranged transversely of the machine, a wormwheel driven-by said Worm and having its axis in line with the axes ofsaid longitudinally arranged worm shafts, and means for operativelyconnecting said, worm wheel with. said longitudinally arranged wormshafts.

In witness whereof, I have hereunto signed my name.

ALFRED TRQSCH.

